In that case, consider a chronic condition. See an ENT. Options exist: balloon dilation of the tube, special pressure-regulating earplugs (like EarPlanes), or even a myringotomy (a tiny tube surgically placed in the eardrum) for frequent flyers.
But in an airplane, it becomes mission-critical. ear blocked airplane
The next time your ears block on a plane, don’t curse the wax. Thank your ancient, imperfect anatomy. And start the Valsalva—gently—before the runway lights appear. In that case, consider a chronic condition